Industrial Step End Mill 4 Flutes for Mold Steel Die Making Precision Machining

Introduction:

Our 4-Flute Step End Mill is engineered for demanding die/mold manufacturing and precision machining applications. Designed specifically for hardened mold steels (P20, H13, D2) and alloy steels, this solid carbide end mill combines high-accuracy step geometry with optimized flute design to deliver exceptional surface finish and extended tool life in complex milling operations.

Features:

✔ 4-Flute High-Efficiency Design

• Balanced between material removal rate and surface finish quality

• Helical flute geometry reduces vibration during side milling

✔ Premium Micro-Grain Tungsten Carbide

• Sub-μm grain structure (0.6-0.8μm) for machining materials up to HRC 55

• Higher transverse rupture strength vs standard carbide grades

✔ Step Geometry Advantages

• Multiple cutting diameters in one tool (e.g. 6mm-12mm in 2mm steps)

• 30°/45°/90° shoulder angles available for different clearance needs

✔ Specialized Coating Options

• AlTiN coating (standard) for high-temperature resistance

• TiSiN (optional) for abrasive composites

• Polished flutes (optional) for non-ferrous materials

✔ Coolant Through Capability

• 2-4 internal coolant holes (Ø1.2mm standard)

• Maintains consistent cutting temperature in deep cavities

Advantages:

▶ 40% Faster Machining vs conventional end mills in S7 tool steel

▶ Ra 0.4μm Surface Finish achievable in finishing passes

▶ Tool Life 3X Longer than HSS-E mills in hardened D2 steel

▶ Single Tool Operation replaces multiple tools for roughing & finishing

Applications:

Mold Manufacturing

• Core/cavity machining in P20 (HRC 30-36)

• Ejector pin holes in H13 (HRC 48-52)

Precision Die Making

• Progressive dies in D2 tool steel

• Blanking punches in A2 steel

Industrial Components

• Turbine blade roots in 17-4PH stainless

• Hydraulic valve bodies in 4140 pre-hard

Detailed Pictures:

Our workshop:

New Customer Special Offers:

To help you experience our premium products, we’re excited to offer the following exclusive promotions for first-time buyers:

1.Free Test Samples

Get free samples (total value ≤ $20 USD) when you cover the international shipping cost.

Perfect for evaluating our product quality and performance risk-free.

2.$50 USD Discount on First Order

New customers can enjoy a $50 discount on the first order of $500 or more.

A great way to start our partnership with extra value!

Our advantages:

1.Advanced grinding machines: All of our grinding machines are WALTER and SAACKE brands.

2.Advanced inspection machines: We have ZOLLER, OMEGA, PG1000, etc. For inspecting each carbide tools.

3.Fast feedback: we offer 24 hours online service

4.Strict quality control system:
We strictly adhere to a three-stage inspection process for each tool:
Raw material inspection
Semi-finished product inspection after production
Final inspection after coating (pre-shipment check)

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